All perfect praise be to Allaah, The Lord of the worlds. I testify that there is none worthy of worship except Allaah and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.
All praise be to Allaah, The Exalted, for granting you guidance and for guiding your wife to Islam. We implore Him to bless you both with steadfastness and adherence to the straight path and safeguard you from misguidance and temptations, what is apparent and what is hidden thereof.
You should know that if your maternal uncle acted as the Wali of this girl with her consent, then the marriage is valid, especially given that you stated in the question that the marriage was conducted in the Islamic center, which legally acts in the stead of the Islamic court. Scholars underlined that when a non-Muslim woman embraces Islam and she has no Muslim Wali and there is no Muslim ruler to act as her Wali in the marriage contract, then any Muslim man may act as her Wali in the marriage contract with her consent. Ibn Qudaamah wrote, "If the woman has no Wali and there is no Muslim ruler to act as her Wali in the marriage contract, then it has been narrated on the authority of Imaam Ahmad ibn Hanbal that any trustworthy Muslim man can act as her Wali in the marriage contract with her permission." [Al-Mughni]
Hence, you are not obliged to renew the marriage contract. For more benefit, please refer to fataawa 88488and 86524.
As for dealing with your community, you should keenly and kindly try to call the members of your community to Islam and should show compassion for them. The believer is enjoined to adhere to two religious obligations, namely, abidance by Truth and being merciful to people.
As for your wife's parents, we advise you to treat them kindly and graciously in order to encourage them to embrace Islam. However, no created being should be obeyed in what constitutes disobedience to the Creator. It is impermissible for you to obey them in shaving your beard; it is prohibited to shave the beard. It has been authentically reported that the Prophet, sallallaahu ‘alayhi wa sallam, said, "There should no obedience to a created being in disobedience of the Creator." You should not pay any attention to their claim about the need for social acceptance.
Finally, we do not know what made you suspicious about your religion; rather, you should feel the opposite and have confidence in it.
Allaah knows best.